garskoci,
The only way that I can see for this to work is for you to run:

#!/usr/bin/perl
use strict;
use warnings;
use WWW::Mechanize;

my $url= 'http://192.168.0.1/WanService.html';
my $mech = WWW::Mechanize->new( autocheck => 1 );
$mech->credentials(
    '192.168.0.1:80',
    'FVS318',
    'admin' => 'secret'
);
$mech->get( $url );
print $mech->content();
[download]

And paste the result here in CODE and READMORE tags. We can then create a mock up locally to do testing.